Instead of THE GUBBMINT being evil by LOCKING EVERYTHING DOWN in some scary QUARANTINE ZONE or the like, imagine a "got to build up zombie bite immunity" response, or one with pseudoscientific treatments, or pretty much anything so 
can feel like things are back to normal while zombies are just a thing that continues happening.
Add your own ideas if you like. 
There's a nice deconstruction of WWZ ongoing on SV.
Lets Read: World War Z: An Oral History of the Zombie War
It takes the form of a in-universe read through of the text, challenging the Hard Men Saved The World narrative as a piece of propaganda to support the US Junta and their overseas allies, by a survivor in Bristol. It reinterprets many events to actually make some kind of sense - North Korea isn't a spoopy megabunker, but close enough that propaganda can spin it that way. Yonkers was a deliberate destruction of units and officers who were considered unlikely to support abandoning half the country to die and couping the government.